This will cause a blue haze when you first start up an engine with four cycles. Though in the less severe cases it goes away after a bit?
What is bad piston rings causing oil to leak into the cylinder.
100
What tool is used to test compression on a two stroke motor?
What is a compression tester.
100
This is used to measure the idle speed of a motor, it uses the vibrations of the motor to give a reading?
What is a tachometer
100
Why is engine timing important?
What is, it controls when the spark is fired and when the valves open.
100
Why are work orders used?
What is, they information to the technician on the fault the operator is experiencing. In turn the tech can document what was found to be the root of the problem.
200
This happens usually when letting off the throttle and for the drama queen, they will think someone is shooting at them?
What is backing firing which is heard, caused by over fueling.
200
What tool is used to test compression on a four stroke motor?
What is a leak down tester.
200
This is used to check the idle speed of a motor, it is usually attached to the spark plug wire in some form?
What is a digital tachometer
200
What would result if the cam gears were not properly timed when resembling an engine?
What is, the valves will be out of time and could end up with bent valves or having them pounded into the head or piston.
200
When documenting faults found on a unit, should all faults be documented even though they are not part of the root problem?
What is, yes all faults should be documented, then the customer can choose whether they need to be fixed as well.
300
When you ride your ATV there is a distinctive antifreeze smell and your coolant has been low after your machine has been running?
What is a coolant leak into the cylinder, head gasket.
300
What is one way of testing compression chainsaw without any tools.
What is, holding the saw by the pull cord and letting the saw fall by the rewind system. Depending on how fast it fast shows how strong the compression is.
300
On a carbureted chainsaw what adjustments can effect the idle speed?
What is, the low speed mixture screw and the idle screw.
300
You notice a lack of power the accelerator is fully pushed. There is a check engine light on and once in a while the vehicle will backfire?
What is poor ignition timing. The Ignition timing is off and depending in which direction and by how much, will cause less or worst symptoms.
300
Why should safety issues be documented and brought to the owner of the vehicles attention?
What is, safety issues, liability can be placed on a shop if they neglect to report it.
400
You notice that your vehicle is no longer accelerating as quickly as it use to. this is especially noticeable going up hills.
What is weak compression due to failing piston rings.
400
When testing compression on a two stroke what must be held open and why?
What is, the throttle, so airflow to the cylinder is not restricted and an accurate reading can be taken.
400
When arriving at valemont for a weekend of snowmobiling in the mountains, you notice your carbureted machine begins to run worse as you go up the mountain. There is lots of smoke and the engine temperature is lower than normal?
What is over fueling. At higher elevations there is less air meaning the engine is getting too much fuel.
400
How is a timing light used?
What is, a timing light is connected to a power source and to the sparking wire. Then the timing light is pointed at the flywheel or crankshaft pulley to illuminate the timing marks.
400
Business will often keep documentation of work done on a customer unit, why is this helpful for the customer and technician?
What is, The business then has on file what was fixed so if that problem occurs again for the same reason the company will take responsibility and properly fix the unit.
500
You notice your temperature gauge is higher than normal and your unit hesitates when returning to idle?
What is, lean running condition, check carburetor for adjustments, cracks on intake boots and that they are installed properly.
500
When performing a leak down test, what does it mean if air is leaking from the intake, exhaust or crankcase vent
What is, not sealing properly on the intake, exhaust valves or past the piston rings and into the crankcase.
500
The engine is idling very fast and adjusting the carburetor does not fix the problem. What is the problem and how would you fix it?
What is, too much air is getting into the engine, since adjusting the carburetor did not help the leak is between the carburetor and the engine. There intake boot from the carburetor to the engine is not connected properly or it is cracked.
500
On older vehicles, this device times the cylinders to spark. These often needed to be re-timed?
What is, the distributor cap.
500
When documenting work done to a unit, what is important to remember?
What is, technicians must document all work done and keep their explanations focused especially when addressing multiple faults. This helps the service writers interpret the information into a customer friendly document quickly.